/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package org.jbpcc.domain.dao.jpa;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;


public class EntityManagerAccessor {
    private static EntityManagerAccessor instance = null;
    private final static String ENTITY_MANAGER_FACTORY_NAME = "jbpcc";
    private static EntityManagerFactory emf =  Persistence.createEntityManagerFactory(ENTITY_MANAGER_FACTORY_NAME);
    
    private EntityManagerAccessor() {
    }


    public static synchronized EntityManagerAccessor getInstance() {
        if(instance == null) {
            instance = new EntityManagerAccessor();
        }
        return instance;
    }
    
    public EntityManager getEntityManager() {
        return emf.createEntityManager();
    }
}
